Motor driven window wiper



June 2, 1936. J. W. cA|N 2,042,456

MOTOR DRIVEN WINDOW WIPER Filed Feb. 16, -15934 2 Sheets-Sheet lcfa/lava Wya.

June 2, 1936. J, W, CMN

MOTOR DRIVEN wINDow WIPER 2 Sheets-Sheet 2 @mul Filed Feb. 16, 1934Patented June 2, 1936 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to a motor driven window wiper and constitutes animprovement of the window wiper shown in my Patent No. 1,903,439.

In the above identified patent, there is shown a reciprocating windowwiper that is adapted to be manually operated. The present improvementconsists primarily in providing a wiper that can be reciprocated by asource of power such as an electric motor. To this end there is provideda novel mechanism for reversing the driving mechanism for the wiper atpredetermined times through the movement of the wiper operatingmechanism.

The invention comprises the novel structure and combination of partshereinafter described and more particularly pointed out and dened in theappended claims.

In the accompanying drawings which illustrate a preferred form of thisinvention and in which .firnilar reference numerals refer to similarfeatures in the diiferent views:

Figure 1 is an elevational view of a window equipped with a windshieldwiper involving this invention.

Figure 2 is an enlarged sectional view taken upon the line II-II of Fig.1 looking in the direction of the arrows.

Figure 3 is an enlarged fragmentary elevational view illustrating thedrive or operating mechanism for the wiper and involving this invention.

Figure 4 isf an enlarged fragmentary elevational View showing the wiperin full lines upon its downward descent.

Figure 5 is an enlarged sectionalv View taken .ipon the line V-V of Fig.4 looking in the direction ofthe arrows.

Figure 6 is an enlarged. sectional View taken upon the line VI-VI ofFig. 4 looking in the direction of the arrows.

Figure 'l is an enlarged sectional view taken upon the line VII-VII ofFig. 4 looking in the direction of the arrows.

The invention is associated with a structure substantially similar tothe structure disclosed in my above identified patents and whichconsists of a window frame I having a transparent pane 2 therein overwhich a wiper 3 is adapted to be reciprocated by an upward and downwardmovement. This wiper 3 is clamped in a plurality of clamps Il comprisingparts of arms 5 rigidly secured to a shaft 5 mounted in bearings 'Iawhich are parts of brackets 8 slidably mounted in slots formed inupright hollow guide members 9 secured upon the frame I as disclosed inmy above identiiied patent. Hollow sleeves 'I are secured to the shaft Eadjacent the bearings 'la for a pur, pose that will later appear. Uponthe inner side of the frame I are substantially similar guide membersIIJ, one of which is shown in Fig. 2.

Above and below the guide members 9 and I0 are sprocket wheels I I whichmay be mounted inf any suitable manner upon the frame I. A sprocketchain I2 is trained over each set of lower sprocket wheels I I and theends of the chain extend upwardly in the guide members 9 and I0. Asprocket chain I3 is trained over each set of upper sprocket wheels I Iand the ends of this chain extend into the guide members 9 and IIJ.

Between the ends of the chains I2 and I3 upon the outer or front side oftheV frame are secured rod-like links It upon which the brackets 8 aremounted. The ends of each rod-like link are provided with guide heads I5that slidably fit in the guide members.

Between the ends of the chains I2 and I3 in the guide members I0 aresecured rod-like links I6 which are connected to the ends of the chainby adjustable screws II which permit a certain amount of takeup. Thelinks I6 carry a manuy ally operable rod I8 by means of which theAdevice may be manually operated. A T-head I9 is secured to an endportion of the rod I8 just inside of the guide member Ill as shown inFig. 3. The T-head is, of course, inwardly oifset to clear the guide I0for a purpose that will later appear.

A motor 20 is mounted upon the frame I. The motor is geared to adownwardly extending shaft 2| having a bevel pinion 22 thereon thatmeshes with bevel gears 23 and 24 loosely mounted upon a shaft 25 uponwhich a pair of the sprocket gears I I aresecured. The confronting endsof the hubs of the gears 23 and 24 are provided with clutch teeth 26 andare formed for cooperation withv similar clutch teeth 21 uponaLsl-idable clutch col-V lar or member 28 mounted upon the shaft 25between the gears 23 and 24.

The clutch collar 28 is provided with a groove 29 for cooperating withthe yoke 30 of a shipper lever 3 I This shipper lever 3| is slidablymounted in the sides 32 of a gear casing surrounding the aforementionedpinions. These sides 32 are of course, provided with suitable slots forreceiving the lever. The outer end of the lever 3| is provided with ahead 33 whereby the same may be manually operated. Within the gearcasing, there is an angle clip 34 attached to one of the sides 32. Aleaf spring 35 is attached to the angle clip directly under the shipperlever. The leaf spring is provided with an upwardly extending rib 35aadjacent its inner end that is adapted to Y cooperate with a teat 3Ia onthe lower edge of the shipper lever.

Upon the frame I, there is pivoted a bell crank lever 36 having one armprovided with a. slot 31 .for engaging a pin 38 Von the shipper lever3|. A rod 39 is connected atrone end to the other arm 36a of the bellcrank lever 36V while the other end of said rod is connected to anintermediate point Y of an arm 40 pivoted at one end to the frame. It

will be'noted that the arm 40 and the arm 36a of the bell crank leverlie in the path of the T- head I 9. Y Y Y Upon the sill of the window,there is a deilector 4I adapted for deflecting the wiper fromrthe windowwhen it reaches its lower limit of movement. Above the window there is adeflector 42 for engaging the wiper with the glass at the upper limit ofmovement of the wiper. Means are provided for holding the wiper inarposition removed from the glass when it is ascending, and foryieldingly urging the same against the glass when it is descending.These means which are shown more clearly in Figs. 4Y to 7 will now beset forth.

"Uponeach end of the wiper c1arnp'4, there is secured accasting 43having a cylindrical' chamber 44 in which a spring pressed plunger 45 ismounted. Each plunger has aconvex head 46 adapted'to snap into anaperture 41 formed in a keeper 48 attached to the inside surface of theadjacent bracket 8. A coil spring 49 located bev tween the Vinner end ofthe plunger head 46 and the end of the chamber normally forces theplunger outwardly. Each plunger is provided with a Vspring 49 so thatthe same are simultaneously forced outwardly for engaging theirrespective apertures and holding the wiper in its disengaged, position.Y Y 1 Within` the aforementioned Vsleeves 1 are coil springs 50 as shownin Fig'. 6. One end of each spring 59is anchored to a sleeve 'I whilethe otherY end is vanchored in the bearing 1a. The springs are, ofcourse, underV tension and; normally tend toV rotate vthe shaft forengaging the wiper with the window. p Y

A guide rod 5I extending between the brackets V8Vlimi'ts the outwardmovement of` the wiper to a position Vwhere the plungers may readilyengage the apertures in the keepers 43.-

In the operation 'of the device,'the motor will K rotate shaft 25 fordriving the sprocket chains or endless members. In the position shown inFig.

2, the wiper Y3 is upon its descent and when it strikes the deector 4 I,it will be thrown outward- Y ly tothe Vposition shown in'Fig. 5 allowingthe plunger 46 to Ysnap into the apertures in the keepers. At about thistime, the T-headV I9 will strike the arm 40 for operating the clutchshifter for reversing therclutch whereupon the wiper will be V movedupwardly until it strikes the deflector 42 which forces the wiperagainst the window, the plungers automatically snapping out of theirkeepers, and the springs urging the wiper against the glass. At aboutthis time, the T-head I9 Vstrikes the arm 36a for reversing the clutchfor causing a downward movement of the wiper.

Thus it will be apparent that the wiper is automatically reversed atpredetermined points and'V is `effective for wiping the glassV only whenit is moving in a downward direction. Y l,

I am aware that'many changes may be made and numerous details ofconstruction may be vay ried through a wide range without departing fromthe principles of this invention, and I, therefore, do not purposelimiting the patent granted hereon otherwise than necessitated by theprior art.

I claim as my invention:

l. In operating mechanism for a window wiper, a wiper carriage includingend brackets having apertures, a wiper pivotally mounted upon saidcarriage, means for reciprocating said carriage,4 means for deectingsaid wiper fromV said window at a predetermined point, and'` springpressed plungers associated with said wiper for automatically andreleasably engaging said apertures when said wiper is deflectedrfromsaid window.

2. In window wiping mechanism, a pair of slidably supported brackets, arod carried by vsaid brackets, a wiper clamp pivotally mounted, uponSaid rod, means for Vraising and lowering Vsaid rod and wiper, saidbrackets having opposed Vaperv tures and spring pressed plungers on saidclamp adapted for releasably engaging said ,aperturesV when said clampis in a predetermined position.

3. In window wiping mechanism including win-V 4. In operating mechanismfor window wipers,`

a wiper carriage having a projecting portion, a

wiper pivotally mounted upon said carriage,V

means for deecting said wiper from the window at a predetermined point,said wiper havinga projecting portion, a spring pressedV plunger mountedin one of said projecting portions and the other projecting portionhaving A, an aperture for releasably, receiving Asaid spring pressed.

plunger.

JOHN W. CAIN.

